Schema:
chip_model (Model_name, Launch_year, RAM_MiB, ROM_MiB, Slots, WiFi, Bluetooth)
screen_mode (Graphics_mode, Char_cells, Pixels, Hardware_colours, used_kb, map, Type)
phone (Company_name, Hardware_Model_name, Accreditation_type, Accreditation_level, Date, chip_model, screen_mode)
Please answer with SQL.